Manufacture of sulfuric acid.



N. L. HEINZ.

MANUFACTURB 0F SUL-FUMO ACID.

APPLICATION FILED NOV. 29, 1909.

STATES PATENT' OFFICE.

TICHOLAS L. HEINZ, 0F LA SALLE, ILLINOIS.

MANUFACTURE or sULrUarc Aon).

Specvciatlon-of ALetters Patent.

` ratentedxMan 25, 1913.

'Application med November 29, 1909. Serial No. 530,361.

To all whom it may concern.' l

Be it known that I, NICHOLAS L. HEINZ, of La Salle, in the county ofLasalle and Stateof Illinois, have invented a certain new andusefulImprovement in the Manufacture of vSulfuric Acid', of which thefollowing is a specification.

My invention relates to the chamber proc'- ess in which7 as usuallycarried out, an excess of oxygen and nitrogen is supplied to the systemby air introduced into the chambers and passed thence .with `the gasesvI have attained this object by supplying the oxygen only as required 1n.the different parts of the apparatus by introducing smaller quantitiesof air at intervals along the system not using any excess at any partthus avoiding too much dilution of the gases and introducing into andpassing through the system much less air than heretofore and obtaining ahigher efficiency in the working of the process.

The accompanying drawings represent diagrammatically an apparatussuitable for carrying my improved process into effect.

4Figure 1 shows a plan view and Fig. 2 a side elevation.

Similar numerals marked on the drawings refer to like parts in bothviews. a

The numeral 3 indicates a part of a flue or pipe leading from a sulfurburner (not shown) to the Glover tower 4, which is connected by a ilue 5to the first of a train of chambers 6 provided with connecting lues 7.The last chamber is connected by a iiue 8 with a pair of Gay-Lussactowers 9 joined at the bottom by a flue 10 and terminating in an exitflue 11.

mprovement 'to' ordinary form and their construction and operation arewell knownand understood by those skilled in the art.

The lnovel part of the apparatus consists 1n an air pi e v12 connectedwith a blower, or source o compressed air (not shown), the pipe beingextended from the blower along below the chambers and to the fartherside of the last Gay-Lussac tower, and bepipe communicating with -thelues 3, 5, 7 8, 10, and 11, and having valves 14, by means of whichtheflow of air from the branches to their several connections may belregulated. By meansof the valved branches 13 and their connections withthe pipe 12" and with the chamber flues, as shown, it is renderedpractical -to distribute the quantity of air used and introduce it atintervals into quired to supply the desired amounts of oxygen atintervals to each of the chambers individually throughout the system.Also to check the speed of movement of the gases in the system andobtainan increase in the .reactions of .the gases, with higherefficiency than heretofore, so far as I am aware.

may thus use less oxygen than heretofore,

taken and introduce it at many intervals into the current or moving massof sulfurous gases so as to avoid material increase of speed 4ordilution-of the gases while undergoing the process of oxidation.'

What I claim is 1. In themanufacture of sulfuric acid by the chamberprocess, the improvement which consists: in distributing and introducingat intervals, the oxygen to be used for oxidizing the sulfurous gasespassing with nitrous gases and steam in the chambers, by admitting atmosheric air into the chambers at such interva s and in such regulated4quant-ities as to maintain a uniform pressure and movement of the gaseswit-hin the chambers and -to supply an amount of oxygen equal to thatconsumed by the reaction of the gases.

2. In the manufacture of sulfuric acid by the chamber process, theimprovement which so far as I am aware, distribute the quantity Theparts thus far described 'are all of l ing provided with branches 13 lOf. smaller the several chambers in just the amount re- Aconsists: intreating the current of nitrous,` gases in the chambers and supplythereto sulfurous gases and steam passlng 1n the an amount of oxygenequal to that consumed towers and chambers of the system with by thereaction o the gases.

such regulated quantities of atmospheric air NICHOLAS L. HEINZ. 5introduced at such different points along the Witnesses:

current and at such times as to maint-ain a J M. G'EIB uniform pressureand movement of the G. MARIS

